九年制免费义务教育 free nine-year compulsory education

普及九年制义务教育 make nine-year compulsory education universal

九年制义务教育 nine years of compulsory education

九年义务制教育 nine-year compulsory education system

强制教育、义务教育 compulsory education

完成九年制义务教育 to complete nine-year compulsory education

主教制主义 episcopalism